Stay-bolt structure



J. R. FL'ANNERY.

STAY BOLT STRUCTURE- PPHCATION FILED SEPT. 10. 1919'.

Patented Mar. 14, 1922.

IN VE N TOR W 7 Allm'neys suitable manner. said integral yielding member having a JOHN ROGERS FLANNERY, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO FLAN- NERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAY-BOLT STRUCTURE.

1,409,162. Specification f I-etterslfitent- Patented Mar..14, 1922. Application filed September 10, 1919. Serial No. 322,868.

To all whom it may concern. Centrally within the cap or closure and Be it known that I, JOHN Rooms FLAN- in the head of the staybolt, an angular re- NERY, a citizen of the United States, and cess or socket is formed to receive a a resident of Pittsburgh, in the county of wrench, with the use of which the bolt Allegheny and State of Pennsylvania, have may be screwed through the inner boiler invented certain new and useful Improvesheet and, in the embodiment of the invenments in Stay-Bolt Structures; and I do tion shown in Figure 1, a tell-tale hole 11 hereby declare the following to be a full, s made in the bolt and communicates with clear, and exact description of the inventhe recess or socket 10, the inner end of tion, such as will enable others skilled in id tell-tale hole terminating below the the art to which it appertains to make and neck portion of the bolt. u the same, 11 the embodiment of the invention This invention relates to improvements Shown in Figure 2, the bolt is made with in staybolt structures for boilers,-one oba tell-tale hole 12 which extends from the ject of the invention being to provide a inner end of the bolt and terminates within staybolt structure in which the staybolt and he headed end thereof. the closure for the opening in the boiler y improvements provide a one-piece sheet shall be comprised in a single inteflexible staybolt and closure and can be ingral structure, and so that the closure porspected either by the tell-tale hole or by the tion of the device shall provide for endwise tapping metho 7 play of the bolt and still be united by aving fully described my invention welding to the boiler sheet. what I claim as new and desire to secure lVith this and other objects in view, the by Letters-Patent, iszinvention consists in certain novelv features 1. In a staybolt structure, the combination of construction and combinations of parts with a bo1ler sheet having an openin of a o u a b as hereinafter set forth and pointed out in staybolt having a head mounted on the e claims. wall of said openlng, a cap or closure for In the accompanying drawings; Figure said opening made integral with said head, 1 is a sectional view, partly in elevation, said cap or closure havin bent portions showing an embodiment of my invention, whereby the same will be yielding and said and Figure 2 is a similar view showing integral, cap or closure having a peripheral another embodiment. portion seated on and disposed at right 1 represents an outer boiler sheet and 2 angles to the boiler sheet. and a weld surthe inner sheet of a boiler. rounding said peripheral portion of the cap he outer boiler sheet is made with an and uniting the latter to the boiler sheet. opening 3, a portion of the wall of which 2. In a staybolt structure. the combinamay be made tapering and rounded to form tion with a boiler sheet having an opening the outer end of a staybolt 6 has a mounta staybolt, of a staybolt having a head ing,-the inner end of said bolt being semounted on said seat and also provided with cured to the inner boiler sheet 2 in any a yielding member integral with said head.

The staybolt may be made of steel and peripheral Wall seated at its edge against made integral with the headed end thereof, the outer face of the boiler sheet, said pcin a spring cap or closure 7 which is so bent, ripheral wall of the yielding member being 1 as at S, as to have suflicient spring or yieldwelded to the boiler sheet. ing action to permit proper longitudinal In testimony whereof, I have signed this play of the staybolt. The peripheral por specification in the presence of two subscribtion of the cap or closure may be made in ing witnesses. the form of a straight wall 8* disposed at right angles to the bo1ler sheet 1 and hav- JOHN ROGERS FLAN N ERY.

A weld 9 surrounding the cap or closure Witnesses: intimately unites the wall 9 of said cap or JAMES R. HORAN, closure to the outer boiler sheet. EDWIN S. RYoE. 

